Posted by: earleb
Posted by: D_C_
SRAM DUB BB92 Pressfit bb - I managed to grab one of the last ones in town, but plan b down the road is to use reducers in a 30 mm ID bb. It turns out the bearings in the DUB bb are 30 mm ID, so you could steal the plastic reducers from an old bb. https://nsmb.com/articles/aftermarket-bottom-brackets-dub-cranks/
An item to note on Sram and Enduro DUB bb's. They have both spec'd a custom bearing where the outer metal race is pressed into the frame. Regular 30mm bb's for BB92 are a tiny standard bearing pressed into a plastic shell, then the polymer shell is pressed into the frame so there is less space for the bearings. I think this distinction gets overlooked when people mention DUB and BB92.
So if you grab a regular 30mm bb for your BB92 and put the DUB inserts in you still get crappy tiny bearings.
I am pretty sure the SRAM bbs have bearings pressed into a cup, which is then pressed into the frame. In my experience, they hold up better than, say, a Race Face Cinch bb, but are still subject to similar thin bearings. The ultimate solution to the problem SRAM and others have created for themselves is, as you mentioned, something like the Enduro or Wheels Mfg bb, where the bearing outer race presses directly into the frame. But those are pricey and also hard to track down right now.
Last edited by: D_C_ on May 18, 2021, 10:52 a.m., edited 1 time in total.